Somehow, my PSP's Flash1 got screwed up, but not enough to semi-brick it. Anyway, I started noticing problems when I would try to bounce back and forth between 01-12.bmp and my custom set wallpaper. Every single time, the PSP would tell me, "There is no custom wallpaper set. Please go to Photo, yaddi yaddi yaddi..." So I went to inspect f1, and sure enough - there are some folders missing. On that note, if anyone could tell me the exact folder structure of f1, I would be most greatful.